organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
         Phylum Mollusca Linnaeus, 1758 - molluscs
           Class Cephalopoda Cuvier, 1795 - cephalopods
             Subclass Coleoidea Bather, 1888
               Order †Belemnitida Gray, 1849
               Order †Boletzkyida Bandel, Reitner & Stürmer, 1985
               Order Octopoda Leach, 1817 - octopuses
               Order †Phragmoteuthidida Jeletzky, 1965 see Order Phragmoteuthida Jeletzky, 1965
               Order Sepiida Gray, 1849
               Order Teuthida Naef, 1916
               Order Vampyromorpha Grimpe, 1917 - vampire squids see Order Vampyromorphida Pickford, 1939